Cleaning device for dandy rolls



April 7, 1953 M. D. soUTHwom-H CLEANING DEVICE: FOR DANDY ROLLS FiledApril 7, 1950 Patented Apr. 7, 1953 UNITED STATES PATENT OFFICE CLEANINGDEVICE FOR DANDY ROLLS Melvin D. Southworth, Springfield, Mass.,assignor to Southworth Company, West Springfield, Mass., a corporationof Massachusetts Application April "l, 1950, Serial N0. 154,643

1 Claim.

This invention relates to improvements in paper manufacture.

The principal objects of the invention are directed to a novel means foroperating in conjunction with the dandy roll of a paper making machinewhich means is adapted to maintain the dandy roll in condition for itsfunction.

A dandy roll has a foraminous surface formed from a woven wire of finemesh and is mounted for bearing on the wet web formed on and carried bythe traveling making element such as the Fourdrinier wire. The dandyroll is rotated by the web and wireand has a certain forming functionand usually, but not always, carries one or l more watermarking deviceson the surface there- The dandy roll picks up more or less ber particlesso that its mesh becomes clogged and its function is impaired, all ofwhich is obviously objectionable. Attempts have been made to prevent theclogging of the foraminous surface by applying fabric to the surface ofthe continuously rotating dandy roll but such has not been entirelysatisfactory.

According to this invention, a bristled member is disposed adjacent thedandy in such a manner that the surface of the dandy in the rotationthereof is cleaned by the bristles. The action is continuous and thebristles operate to remove from the surface of the dandy such matter astends to clog the mesh of the dandy covering and characteristics of theWatermarking devices and is otherwise foreign thereto.

With the foregoing and various other novel features and advantages andother objects of my invention as will become more apparent as thedescription proceeds, the invention consists in certain novel featuresof construction and in the combination and arrangement of parts as willbe hereinafter more particularly pointed out in the claim hereuntoannexed and more fully described and referred to in connection with theaccompanying drawing wherein:

Fig. 1 is a side elevational View of a dandy roll having the cleaningdevice of the invention associated therewith;

Fig. 2 is an end elevational View of the apparatus shown in Fig. 1; and

Fig. 3 is a sectional elevational view on the line 3--3 of Fig. 1.

Referring now to the drawings more in detail, the invention will befully described.

Side rails such as are usually employed in a paper making machine arerepresented by 2 which, as usual, have dandy stands 4 fixed to andextending upwardly therefrom.

A dandy roll of ordinary form having a woven wire covering isrepresented by 6 and has end shafts or trunnions 8 disposed in bearingsI0 of the stands.

Brackets I2 which may be adjustable by screws I4 of the stands havesaddles I6 in which end portions I8 of a longitudinal bristle support 20are received.

Brstles 22 extend downwardly from the bristle 2 support 20 and areadapted to engage the surface of the dandy roll 6.

The dandy roll rests on the paper web carried by the wire W so that itis rotated thereby as the wire carries the web along.

The dandy roll being in continuous rotation, its surface is acted uponby the bristles which lift off therefrom fiber particles and the like sothat the surface of the dandy is maintained clean at all times.

The brackets I2 may be moved up or down so as to adjust the bristlesrelative to the dandy and vary the action thereof.

The bristles 22 may be natural or synthetic all as it may be desired andthe length thereof may be such as will provide the most efcient cleaningoperation.

The invention may be embodied in other speciflc forms without departingfrom the essential characteristics thereof. Hence, the presentembodiments are therefore to be considered in all respects merely asbeing illustrative and not as being restrictive, the scope of theinvention being indicated by the appended claims rather than by theforegoing description, and all modifications and variations as fallwithin the meaning and purview and range of equivalency of the appendedclaim are therefore intended to be embraced therein.

What it is desired to claim and secure by Letters Patent of the UnitedStates is:

The combination with transversely spaced stands extending upwardlyvertically from side rails of a paper making machine of means forcleaning the surface of a dandy roll continuously rotated in said standsby a paper web being formed on a continuously moving Fourdrinier Wirecomprising, a brush structure including an elongated bristle supporthaving opposite end portions and bristles extending downwardly therefromfor brushing the surface of a rotating dandy roll, adjusting means inupper sides of said stands movable up and down vertically to adjustedpositions, brackets in engagement with and moved up and down by saidadjusting means provided with saddle slots open on upper sides thereofin which opposite ends of said bristle sup.. port are seated, alladapted and arranged whereby said bristle support may be moved up ordown for variable engagement of said bristles with the upper side of thedandy roll surface.

MELV'IN D. SOUTHWORTH.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,637,169 Youngchild July 26,1927 2,220,853 Sinclair Nov. 5, 1940 FOREIGN PATENTS Number Country Date336,916 Germany May 19, 1921

